Vendor Teakra, make emulator own DSP RAM and add DSP RAM to fastmem (#806)

* DSP: Own DSP RAM and add it to fastmem

* Vendor Teakra

* Add MacOS support to fastmem

* Fix MacOS fastmem paths

* Fix iOS build

third_party/teakra/src/disassembler_c.cpp

@@ -0,0 +1,23 @@
+#include "teakra/disassembler.h"
+#include "teakra/disassembler_c.h"
+
+extern "C" {
+	bool Teakra_Disasm_NeedExpansion(uint16_t opcode) {
+		return Teakra::Disassembler::NeedExpansion(opcode);
+	}
+
+	size_t Teakra_Disasm_Do(char* dst, size_t dstlen,
+			uint16_t opcode, uint16_t expansion /*= 0*/) {
+		std::string r = Teakra::Disassembler::Do(opcode, expansion);
+
+		if (dst) {
+			size_t i = 0;
+			for (; i < (dstlen-1) && i < r.length(); ++i) {
+				dst[i] = r[i];
+			}
+			dst[dstlen-1] = '\0';
+		}
+
+		return r.length();
+	}
+}